class Firstday
 {
	public static void main(String[] args)
         {
		System.out.println(" Addition Of Numbers ");

		int a=10;
		int b=20;
		int c=a+b;
		System.out.println("Addition of two numbers=" + c + " ");
		int d=a+b+c;
		System.out.println("a=" + a + "  b=" + b + "  c=" + c );
		System.out.println("Addition of Three Numbers =" + d + " " );

		System.out.println(" Hello Program " );

		System.out.println("Hello Felight");
	  	System.out.println(" \" Hello Felight Java is fun\" ");
		
		System.out.println(" Fahrenheit To Celsius " );		

		double fah = 100;
		double cel = (5.0/9) * (fah-32);
		System.out.println( "Fahrenheit " + fah + " is " + cel + "in Celsius ");
		float f = (float)10.1;
		int i = (int)f;
		System.out.println("Float value =" + f);
		System.out.println(" Integer Value =" + i);

		System.out.println(" Area Compute Program ");

		
        	double redius;
		double area;
	
        	redius=20;
	
		area = redius + redius * 3.14159;	
		System.out.println("The area of circle with redius " + redius + "  is  " + area);

		System.out.println("  Find the value of 1.0 - 0.5 ");

		System.out.println(1.0-0.5);
       		 System.out.println(1.0-0.1-0.1-0.1-0.1-0.1);
		double a1 = 1.0 - 0.1;
		System.out.println(" a= " + a1);
		double b1 = a-0.1;
		System.out.println(" b = " + b1);
		double c1 = b-0.1;
		System.out.println(" c = " + c1);
		double d1 = c-0.1;
		System.out.println(" d = " + d1);
		double e = d-0.1;
		System.out.println(" Value of e = " +e );

		System.out.println(" Preincrement and Postincrement ");
		int x = 20;
		System.out.println(x++);
		System.out.println(++x);
		System.out.println(x++);

		
	}

 }	  